Thread cutter and clamp for shuttles



Oct. 11, 1932. o v PAYNE v THREAD CUTTER AND CLAMP FOR SHUTTL ES Filed March 4, 1931 IN vE/v TOR 054% 1/84 YNE {AW 5 9M A 77'0RNEY5 MASSACHUSETTS Patented Oct. 11, 1932 KNOWLES LOOM- WORKS,

7 Application filed March 4,

This invention relates to improvements'in 7 thread cutters for the outgoing bobbin of weft set forth in the claims.

replenishing looms audit is the general object of the invention to provide a cutter with means which will insure the severing of: the thread adj acentthe shut-tle eye. l 7

At the time of replenishment inan automatic loom it is desirable to cut the end ex- 7 tending from the outgoing bobbin at a point adjacent the eye so that 's'aid end' may be withdrawn by its bobbin at the time of transfer withoutrequiring additional devices; It is an important object of my presentinvention to provide a shuttle with one of a pair of coacting thread parters the other ofwhich may be mounted independently of the shuttle and brought into action by forward movement of the shuttle. The member independent of the shuttlemay have a sliding movement along a hard shuttle carried surface over which the weft extends, the effect of whichis to produce "a tension in the weft which, in addi-f tion to the pinching action between the members, will insure thread parting.

It is a further object of the present invention to provide a clamp closely adjacent the j cutting members so that the tensional strain placed on the weft end may not extend back to the selvage but be limited to thatpart of the thread extending between the cutters and the clamp.

It is another object of the present invention to provide a clamping element sufiiciently resilient to hold the thread against movement across the shuttle carried surface,'the clamping element being soft enough to hold the weft without parting it. In the prat-ical embodiment of my invention there'will be two clamping surfaces and two parting surfaces, one of each being carried by the shuttle, and for purposes of convenience the clamping'and parting surfaces on the shuttle are inadepart of the same instrumentality,

although this is not essential! With these and other objects in view which will appear as the description proceeds, my

invention resides "in the combination and arrangement of parts hereinafter descrlbed and V In the accompanying drawing, wherein a tion of arrow 2, Fig. 1","

or woncns'rnn, mAssAcnosnrrs, A CORPORATION V or THnEAncotrTERiAnn enema on. sHU'r'rLEs 1931. Serial" No. 520,044.

convenient embodiment'of myinvention is'set forth, r f Fig. 1 is a top plan Fig. '3 is a vertical; detailed V on line 33 of Fig. 1, and

Fig. 4 is a view similar to'a portion of Fig, 1 but showing the parts in aldifferent posio tion. v 7

Referring to the drawing, I have shown a shuttle S h'avingmounted therein a bobbin B and having a shuttle eye E through which the weft W extends. A-side delivery eye 10 com municates with the thread passage 11 and is the outlet through which the weftis led from the bobbin chamber. When the' shuttle is in the magazine side of the loomthe'weft will extend to the left toward the adjacent selvage 12. The shuttle may be 1 provided with a" thread groove 13 which provides a small passageway for the weft between the box front 14 and the front wall 15 of-the shuttle. j [Extending above and below both the'delivery eye and-the groove13is a platelo held plate having preferably a hard surfaceover which the weft extends when the shuttle is on the magazine end of the loom. The plate is set forthherein as having a smooth front face, but my invention isnotlnecessarilyflimited to a plate characterized by such a suror face. V

'The loom frame 20 has projecti'ng therefrom a bracket 21 on which is adjustably mounted a bed 22 and cap 23 held thereto by a screw or bolt 24. Slidably mounted in the bed and under the cap is a carrier 25 the forward end of which is upturned asat 26. A lever 27, controlled by the transfer mechanism T, is pivoted at 28 and urged by a torsion spring 29 to move in a counter cldckwise I 'I view of a shuttle, and thread parting and clamping mechanism made according to my present invention, i

Fig. 2 is a side elevation taken in thedirec 7 section taken a to the shuttle" in any approved manner, said at 36 to the arm 31 and carries at the rear end thereof a soft cushion 37, such as rubber. The latter is positioned for engagement with the left hand part of the plate 16, whereas the head 33 is positioned to engage the-right hand partof the plate; A compression spring 38 is located between the cap and bedand acts on an offset 39 of arm 31 to hold said arm in thdhorinal position shown in Fig. 1- against a stop 40 on the slide A leaf spring 41 yieldingly holds the clamp arm against stop 42 on the cutter arm, 7 I .7 i

In. operation, the transferring mechanism will hold the lever 27 so -that the-right end thereof will be forward the effect ofwhich is .to maintain the slide 25 in forward position against the action of spring 38. This relation exists untiltransfer is about to take place, at whichpt-ime that part of the transferrer mechanism in contact with the lever 27 moves rearwardly and thefllatter is free to move about its pivot in a counter-clockwise direc- 131011 as viewedin Fig. 1. This motion may be induced either by the spring 29, or in the 'abse nce of the latter, jby the spring '38. The

.carrieriand its pivoted arm or lever 31 will move rearwardly during the advance move 'clamped between the cushion and the plate the headwill'engage the plate to pinch the weft against the latter. 7

It is to be understood that the cushion is soft enough to withstand a relatively large compression before exerting sufficient force tov move; the arm 31 forwardly against the action of the stiff spring 38, and it is for this reason that the rear of head 33, which may be formed as a knife edge, will be able to strike the plate. During continued forward movement of the shuttle the head will have a l tendency to slide along the plate toward the movement;

eye, but the frictional contact between the cushion and the plate will hold the rear end of .arm 35 against substantial longitudinal Because of the relation of the -parts, angular movement of the lever 31 around its pivot 30. will carry the stud 36 forwardly and also to the right so that the knife edge of the head may remain in sliding contact with the platesufficiently long to partthe weft, as indicated in Fig. 4.

From the foregoing it will be seen that I have provided a simple means for clamping the weft against the front wall of the shuttle tprior'to the parting of the weft by theaction of the shuttle and the cutter head. As a result, any strain which may be imposed upon the weft by the sliding movement of the head will be communicated no farther than the cushion, and even though breakage should j exist between the head and cushioninstead of. "atthe head, the remaining end will be so short that it canflbe readily withdrawn from the delivery eye either by the outgoing bobbin or on the subsequent pick of theloom.

Itwill further be seen that the cushion is of 7 such a nature that it is capable of a relatively high degree of compression before commumeating .a moving, force to the carrler 25 or the lever 31,and during the compression of -the'cush'ion thehead is free'to slide along and in contact with th e'plate for the purpose of parting the weft. ,5 It will also be, seen thatthe spring 35' is so placed as to be operatively related tothe' control lever 27 and is effective to move the latter independently of the tersion spring 29. Leaf; spring 41 restores the parts of normal position after the cutting is completed.

. Having'thus described my invention it will be seen that changes and modifications'may be made therein by those skilled ,in the art without departingfromthe spirit and scope Y of the invention and I do not wish to be limited tothe details herein disclosed, but what I claim is:

v 1. The weft parting mechanisrn'for a loom operating with a shuttle movable forwardly and from Whicha weft threadextends', a pair of clamping elements one of which-is carried by the shuttle, a pair of thread parting members one of-which is carried by the shuttle,

and means to render the clamping'elements operative prior to the operation of the parting members during the forward movement of the shuttle.

2. In thread partingmechanism for a'loom opera.tingwith a shuttle movable forwardly and fromwhich'a weft thread extends, means to clamp the weft against the shuttle as the latter moves forwardly, and means to part the weft adjacent theclamping means,both

of said meanseengaging a surface carried by the front wall ofthe shuttle to perform their respective functions.

3. In thread parting mechanism for a loom operating with a shuttle movable forwardly Y therein and from which a weft thread extends, means to clamp the weft against the shuttle, and means to part the weft adjacent the clamping means, the clamping-and parting means beingbrought into'action by for- Ward movement of the shuttle, both of said means engaging a surface carried by the front wall of the shuttle to perform their respective functions. f

4. In thread parting mechanism for a-looin operating with a shuttle movable forwardly therein and from which a weft thread eX- tends, a weft clamping means, and a cutting means, each dependent for operation upon forward movement of the shuttle, the parting means to operate subsequent to the operation of the clamping means, both of said means engaging a surface carried by the front wall of the shuttle to perform their respective functions. o 1

5. In thread parting mechanism for a loom operating with a shuttle movable forwardly therein and from which a weft thread extends, a pair of weft parting members oneof I I itends, two separate fdevicestofforce the weft against the sh'uttle, one of said devices maintainingdts longitudinal position'. unmoved swith-respectto the shuttle and the'iotherdewhich is carried by the front wall of the shuttle, a pair of clamping elements one of which is carried by the front wall of the shuttle, the clamping elements being between the parting members and the adjacent selvage, and means to effect operation of the clamping elements prior to operation of the parting members durlng'forward movement of the shuttle.

6.7 Inthread parting mechanism for aloom operating with a shuttle movable forwardly therein and from which a weft thread extends, a clamping and weft parting plate carriedby the shuttle,'a weft parter independent of the shuttle to cooperate with the plate, and a thread clamp independent of the shuttle to cooperate with the plate to clamp the weft, the parting and clamping members being dependent for operation upon forward movement of the shuttle. j

7. In thread parting mechanism for a loom operating with a shuttle movable forwardly therein and from which a weft thread extends, a clamping and'weft parting plate carried by the shuttle, a weft parter indepedent of the shuttle to cooperate with the plate, and a thread clamp independent of the shuttle to cooperate with the plate to clamp the weft,

the parting and clamping members being dependent for operation upon forward movement of the shuttle, the clamping means operating prior to the parting means and during operating of the latter.

8. In thread parting mechanism for a loom operating with a shuttle movable forwardly therein and from which a weft thread extends, a weft delivery eye carried by the shuttle, a weft parting and clamping mem: ber carried by the shuttle adjacent the de livery eye, a thread clamping element to co-.

operate with the member to clamp the weft against the latter, and a thread parter to engage the member between the' clamp and the eye, the parter being dependent for its operation upon the forward movement of the shuttle.

9. In thread parting mechanism for a loom operating with a shuttle movableforwardly therein and from which a weftthread extends, means to hold a portion of the weft against the shuttle to prevent said weft from I moving longitudinally of the shuttle, and a weft parter slidable along the shuttle relatively to the holding means to cut the weft.

10. In thread parting mechanism for a loom operating with a shuttle movable forwardly andjfroi'nfiwhich a weft thread exwardly and :from 'which a"weft"ithread" exvice 1 sliding lll ongitudinally of: the shuttle during forward movement of the latter, the 580 second; named device parting the weft iv -12. In thread -partingmechanism for a loom. operating with a ishuttle movable forwardly and from -which ..a weft thread eX- tends, aside, 1 slipping wv'eft parter to slide 1 :along a shuttlecarrier surface-in engagement with the weft, and means: to :confinethe strainon the weft incident to" the sideslipping member *towayportion of thenweft ex: tendinglalongtheshuttle.

-13.. Inithread parting .mechanismrifora loom operating'withrash-ut tle movableafor- I wardly and from which a weft thread extends, means to subject the'weft to'gabreaking strain by placingsaid weft under tension," and, means to confine the tensional strain to a portion of the weft extending along the shuttle.

14; In thread partingmechanism for a loom operating with a shuttle movable fortends, means cooperating with the shuttle to subject the weft to a breaking; strain by placing said weft under tension, and means cooperating with the shuttle to confine the is applied.

1.100 wardly and from which a weft thread ex v .105 V tensional strain-t0 a portion of the weft ad. I jacent the point at which the tensional strain.

'15. In thread parting mechanism for a loom operating with a shuttle movable forwardly and from which a weft thread extends, means to subject the weft to a breaking strain by placing said weft under tension,(

and means to confine the tensional strain to I 1115 a portion of the weft at a point between the ends of the shuttle. a

16. In thread parting mechanism for a loom operating with a shuttle movable forwardly and from which a weft thread extends, a combined thread cutter and weft.

parter dependent upon the forward movement of the shuttle and acting first to clamp the weft-against the shuttle and to thereafter part the weft. I

17. In thread parting mechanism for a loom operating with a shuttle movable forwardly and from which a weft thread extends, a combined thread cutter and weft parter dependent upon the forward move-' v ment of the shuttle and acting firstto clamp L the Fweft against the shuttle and to thereafter part the weft, and :a resilient mount- 'ing fOIr-Sfiid combined clamp and patter movableforwardly znnderga tome derived from V the advancing shuttle.

1'8, In thread panting 'mec'hanism for a loom operating with a shuttle movable .fore wardly and fromrwhich a weft'thread ex- 7 tends,' weft cl'ampingmeazns, a Wflfft patter,

:10 means to bring the clamping meansand panter into operation successively during forward movement of the shuttle by a force dGliVBdifIOIIl the shuttle, the clamping means ,7 Y

. and patter being movable relative'lyto each '15 other,

' 19. In thread parting mechanism for a loom operating with :a .shuttlemovable forwvardlgy and from which a weft 'thnead ex tends, weft :clamping means, a weft uarter,

'20 means to bring the clamping means and parter into operation successively during forward movement of the. shuttle by :a force derived from the Shuttle, the clamping Vmeans and parter being movable .relativel y 2 to each other, and a common yielding support to hold said clamping means and parter in wshuttle engaging position. i V V I In testimony whereof I have hereunto affix-ed my signature.

OSCAR V. PAYNE. 

